times.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static	char	*sccsid = "@(#)times.c	4.1	(ULTRIX)	7/3/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1987 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/************************************************************************
 *			Modification History				*
 *									*
 *	Mark A. Parenti							*
 * 0001	Make changes for POSIX compliance.  The change is to return	*
 *	the elapsed time since the epoch.  Also include times.h		*
 *	rather than define the tms structure in this file.		*
 *									*
 ************************************************************************/

#include <sys/types.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/resource.h>

extern int	getrusage();
extern long	time();

clock_t
times(tmsp)
	register struct tms *tmsp;
{
	struct rusage ru;

	if (getrusage(RUSAGE_SELF, &ru) < 0)
		return (-1);
	tmsp->tms_utime = scale60(&ru.ru_utime);
	tmsp->tms_stime = scale60(&ru.ru_stime);
	if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
		return (-1);
	tmsp->tms_cutime = scale60(&ru.ru_utime);
	tmsp->tms_cstime = scale60(&ru.ru_stime);
	return 60L * time( (long *)0 );
/*	return (0); */
}

static
scale60(tvp)
	register struct timeval *tvp;
{

	return (tvp->tv_sec * 60 + tvp->tv_usec / 16667);
}